Writing-machine.



L. U. MYERS. WRITING 1110111115. APPLIUATIOK FILED JAN. 30, 1906.

Qxhlmcooco L W v/ 0. W 51g jtu 61 11 if Patented Apr. 13, 1909.

L. G. MYERS. WRITING MACHINE. APPLICATION FILED JAN.30, 1906.

918,354. Patented Apr. 13, 1909.

2 SKEETS-SHEET 2.

lllllnu awummto z Q/Vi lMeoo'Qo I I M H 2 .UJJA NJ UNITED STATES PATENT OFFICE.

LEWIS c. MYERS,

OF NEW YORK, N. Y., A'SSIGNOR TO ROYAL TYPEWRITER COMPANY, OF

HOBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

WRITIN GvMACHINE Specification of Letters Patent.

Patented April 13, 1909.

To all whom it may concern:

Be it known that I, LEWIS C. MYERs, a

' citizen of theUnited States, residing in the manipulation of a cylindrical platen of a tures of novelty hereina writing machine and comprises several feater set forth in detail.

1 in the accompanying drawing: Figure 1 is sup a of the left hand end of so much of a typewriter carriage and platen as appears to be desirable for illustration of this invenitionz Fig. 2, an elevation of the same end of the carriage but in section through the sleeve that attaches the knob or turning handle to the platen shaft: Fig. 3, a section on the line 3, 3, of Fig. 1, the laten ratchet wheel being shown in dotted ines in order not to obscure illustration of parts which in this view are behind it; Fig. 4, a front elevation of the end of the laten and carriage indicated in Fig. 1: Fig. 5, an end elevation of theplaten with the platen shaft and ratchet wheel collar in sectionz'Fig. 6, a detailed side elevation showing the platen ratchet wheel and some associatedparts.

The carriage, which may be of any usual or ap ropriate construction, is mounted to trave in any desired way and is com osed of end plates 0., one only of which is s own, connected by the shaftsextending between them.

b is a scale; a, a ipaper retaining bar extending across the ront of-the platen and orted by arms extending from a rock shat d; f, indicates a sheet metal paper guide; devices for adjusting the tension of cod ro ers, not shown; and h, a tabulator rack. None of these form any part of the invention herein claimed, and are of usual construction and operation, or of special construction and operation claimed by me in other applications.

The platen shaft 4'. extending through and rotating with the platen, but detachably connectedtherewith, as by a set screw at the right hand side of the carriage, has its bearings in thefend lates 0. Inside the end plateo is a ratc et wheel 7' carried by a sleeve-j loosely enveloping the platen shaft, the wheel and platen ueing coupled to turn from it into a slot p edge ofthe plate.

together by a pin is in the wheel fitting in either of multiple recesses 7c, 7c, in the end of the platen,two being shown. The ordinary turning knob m is ap lied to the platen shaft outside of the end p ate-by meansof a set screw m. The ratchet wheel is formed with an uneven number of teeth and the re cesses 7c inthe end of the platen are dia metrically opposite each other. When, therefore, worn'by continued impact ofthe type, the unused part of the platen between such lines of wear may be brought into the printing line by shifting the lateral pin k to t e other recess 7a. This chan e may be conveniently accom lished y disengaging the platen shaft rom the platen, withdrawing the latter from engagement with pin is, and then partially turning the platen. This loose interlocking connection between the ratchet wheel and platen permits ready removal and replacement of the latter. M

To effect at will different line spaces, the ratchet wheel has apg ied to it an adjustable circumferential guar n that serves to control engagement with the wheel of its actuating pawl 0. The guard covers part of the periphery of the ratchet wheel and is shown as a flange carried by a plate or flat lever arm p, the bearin sleeve of which turns loose y ratchet w eel sleeve 7" and end plate a. It is adjusted by means of a knob p projecting in the end plate, formed at its lower end with a recess p into the surface of the platen becomes.

which the knob passes when in its lowermost position and in which it is frictionally hold.

A yielding roller 8 carried by a spring arm,

bears upon the periphery of the ratchet wheel, and acts to prevent over-throw of the ratchet,. and also by pressure against the inclined faces of the ratchet teeth serves to justify the laten by forcing it into exact po= sition for t e rinting operation, thereby 1nsuring regular e spacing.

When the knob p is at the upper end of the slot, the rocking guard-carrying late is held by a spring'stop 1' resting in t e first one of three notches g in the curved upper ln'this osition, the reciprocable pawl o is permitted to engage every third tooth of the ratchet and a maximum line space is afforded. When the knob is moved down in its slot until the stop 1' engaged the second notch. g, the pawl is per- I mitted to engage alternate teeth of the stop roller 8, holds the roller out of engagement with the ratchet wheel which may then be set in any position.

In the construction illustrated, the pawl 0 is arranged and operated as follows: It is loosely pivoted in the upper end of an up right lever t pivotedon the end plate and connected by a link a with one arm o of a bell crank lever rocking about a vertical bearing in a bracket to on the end plate and having an elongated arm as provided with a thumb piece by which it may be vibrated. A coiled spring y applied around the pivot bolt or pin 2 upon which the upright lever t turns has one end a plied to the bracket to and the other end to the upright lever, the reaction of thespring serving normally to hold the dog 0 in 1ts advanced position. The pawl 0 is pressed into engagement with the ratchet by a coiled s ring. y applied around its pivot, and overt row of the ratchet is prevented b a laterally projecting bolt 0' against whic the inclined upper edge 0 of the pawl works.

A close adjustment is afiorded by mounting,

the bolt eccentrically and applying a check 'nut to its end."

- I claim as my invention:

1. A writing machine comprising the combination of a platen shaft with a turning knob, a ratchet wheel mounted loosely on subscribed my name.

the shaft, a platen mounted on the shaft, a positive interlocking separable commotion etween the platenand the ratchet wheel by which either may drive the other in either direction, and means for securin andloosening the platen on the shaft, W ereby the laten may be loosened and moved endwise or fixed positive adjustment with respect to the ratchet.

2. A writing machine comprising the com- I bination of a platen shaft with a turning knob, a ratchet wheel with an unequal numher of teeth loosely mounted on the shaft, 9. I

curing and loosening the platen on the shafti whereby the platen may be loosened an moved endwise to vary the pin and recess connection between it and the ratchet wheel.

3. Ina writin machine, the combination of a rotatable p aten, its ratchet wheel and reci rocable actuating pawl, means for normal y acting upon the ratchet wheel to jun tify its osition and that of the platen anti means or reventing enga ement' oi pawl with t e ratchet whee and throwing said justifying means out of o oration, whereby the laten may be turne to and remain in any esired position.

* In testimony whereof, I have hereunto LEWIS-C. MYERS. Witnesses:

LILLIEF. BROWNING,

KATHARINE MAOMAHON.

the 

